chore: release 1.14.0 (#487)

* updated CHANGELOG.md [ci skip]

* updated setup.cfg [ci skip]

* updated setup.py [ci skip]

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/google-auth/#history
 
+## [1.14.0](https://www.github.com/googleapis/google-auth-library-python/compare/v1.13.1...v1.14.0) (2020-04-13)
+
+
+### Features
+
+* add default client cert source util ([#486](https://www.github.com/googleapis/google-auth-library-python/issues/486)) ([ed41b49](https://www.github.com/googleapis/google-auth-library-python/commit/ed41b49e9d7ba7402b27107b7aa47eed06ac6c55))
+
 ### [1.13.1](https://www.github.com/googleapis/google-auth-library-python/compare/v1.13.0...v1.13.1) (2020-04-01)
 
 

setup.py

@@ -30,7 +30,7 @@
 with io.open("README.rst", "r") as fh:
     long_description = fh.read()
 
-version = "1.13.1"
+version = "1.14.0"
 
 setup(
     name="google-auth",